CVE-2021-20153
CVSS V2 Medium 6.9
CVSS V3 Medium 6.8
Description
Trendnet AC2600 TEW-827DRU version 2.08B01 contains a symlink vulnerability in the bittorrent functionality. If enabled, the bittorrent functionality is vulnerable to a symlink attack that could lead to remote code execution on the device. If an end user inserts a flash drive with a malicious symlink on it that the bittorrent client can write downloads to, then a user is able to download arbitrary files to any desired location on the devices filesystem, which could lead to remote code execution. Example directories vulnerable to this include "config", "downloads", and "torrents", though it should be noted that "downloads" is the only vector that allows for arbitrary files to be downloaded to arbitrary locations.
Overview
- CVE ID
- CVE-2021-20153
- Assigner
- vulnreport@tenable.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-12-30T22:15:08
- Last Modified Date
- 2022-01-07T16:27:36
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:trendnet:tew-827dru_firmware:2.08b01:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:trendnet:tew-827dru:2.0:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:M/Au:N/C:C/I:C/A:C
- Access Vector
- LOCAL
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- COMPLETE
- Availability Impact
- COMPLETE
- Base Score
- 6.9
- Severity
- MEDIUM
- Exploitability Score
- 3.4
- Impact Score
- 10
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- PHYSICAL
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 6.8
- Base Severity
- MEDIUM
- Exploitability Score
- 0.9
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://www.tenable.com/security/research/tra-2021-54 | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-20153 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20153 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:38:05 | Added to TrackCVE | |||
| 2022-12-06 05:21:15 | 2021-12-30T22:15Z | 2021-12-30T22:15:08 | CVE Published Date | updated |
| 2022-12-06 05:21:15 | 2022-01-07T16:27:36 | CVE Modified Date | updated | |
| 2022-12-06 05:21:15 | Analyzed | Vulnerability Status | updated |